879233221 has 2 divisors, whose sum is σ = 879233222. Its totient is φ = 879233220.

The previous prime is 879233219. The next prime is 879233249. The reversal of 879233221 is 122332978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 757020196 + 122213025 = 27514^2 + 11055^2 .

It is a cyclic number.

It is not a de Polignac number, because 879233221 - 2¹ = 879233219 is a prime.

Together with 879233219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (879233291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439616610 + 439616611.

It is an arithmetic number, because the mean of its divisors is an integer number (439616611).

Almost surely, 2^879233221 is an apocalyptic number.

It is an amenable number.

879233221 is a deficient number, since it is larger than the sum of its proper divisors (1).

879233221 is an equidigital number, since it uses as much as digits as its factorization.

879233221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 879233221 is about 29651.8670744356. The cubic root of 879233221 is about 958.0055602207.

The spelling of 879233221 in words is "eight hundred seventy-nine million, two hundred thirty-three thousand, two hundred twenty-one".